iMac not finding HD

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My iMac is not finding the hard drive. I am getting the flashing question mark when I boot up. Here is what I've tried (all based on reading forums - I don't really know what I'm doing!)...

- Rebooted in safe mode by holding shift key.
- Rebooted with unplugged mouse & keyboard.
- Unplugged power source for 15 seconds.
- Reset PRAM.
All of the above result in the same flashing question mark.
- Rebooted while holding option key. This results in a blank grey screen.
- Try to boot from my Leopard OS X upgrade disk so I can access disk utility to repair permissions, but my HD does not show up on the left sidebar.
- When I try to reinstall Leopard, I get the message "Mac OS X v10.4 or later could not be found".
- So now I get out my original OS X install disks (Tiger) and perform the Apple Hardware Test (holding the D key while rebooting) and got the message "No trouble found".
- When I try to reinstall the original OS X 10.4.4 and try to "select destination", there are no options.
- If I plug in my external drive (that I use for my MBP) via firewire and hold option to boot from that, I can access all of those files (it has OS X 10.5.8 backed up on it), but I still cannot get to the iMac's hard drive.

Does anyone have any other ideas for me?

Appreciate your help!
 
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G'day and welcome to the forums.

Try holding down the 'C' key with the OS Tiger disc if you are 100% sure it is the original disc that came with the computer, go into Utilities and run Disk Utilities > Repair Disc and see what is reported. Sounds like you have a failed hard drive. That is one of the drawbacks purchasing upgrade operating systems booting to repair disk.
 

chscag

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I agree with Harry. Your hard drive has likely failed. It's probably time to install a new one. Instructions and tools needed for opening up the iMac and swapping out the drive can be found at iFixit: The free repair manual.
 
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When I hold C & reboot with the original Tiger install disc & go into Utilities, my hard drive is not shown on the left sidebar. All I see listed there is my DVD/CD drive with the Tiger install disc underneath it.

Is this further confirmation that I have a failed hard drive?

The Apple Hardware Test didn't reveal any trouble... does that mean anything in regard to the hard drive?

Thank you for the replies.
 

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